Chemical maker Lanxess AG (LXS), the second-worst performer on Germany’s DAX index last year, named Merck KGaA (MRK) finance chief Matthias Zachert as CEO, displacing Axel Heitmann. Lanxess stock rose the most in more than two years while Merck fell the most in more than four. Zachert will start by May 15, the Cologne, Germany-based company said yesterday.